Mitsubishi Electric MELSERVO-J5 MR-J5 Series User Manual page 280

• SON-off, RES-on, and EM2-off check during the ABS transfer
If the ABS transfer mode is turned on, and after the transfer starts, if SON-off, RES-on, or EM2-off before the 19th ABST is on,
this will be treated as a transmission error and [AL. 0E5] occurs.
SON (Servo-on)
ABSM (ABS transfer mode)
ABSR (ABS request)
ABST (ABS transmission data ready)
[AL. 0E5 ABS time-out warning]
• Checksum error
If the checksum error is detected, retry the transmission of the absolute position data.
Using the sequence check program of the programmable controllers, turn off ABSM, and after a lapse of 10 ms or longer, turn
SON off once (off time longer than 20 ms is required), then turn on SON again.
If the absolute position data transmission is not completed normally even after retry, perform the ABS checksum error and
error processing.
When a checksum error occurs, the start command should be interlocked with ABST to disable the positioning operation.
The following shows an example of three retries are performed.
SON (Servo-on)
ABSM (ABS transfer mode)
ABSR (ABS request)
ABST (ABS transmission data ready)
ABS checksum error
7 ABSOLUTE POSITION DETECTION SYSTEM
278
7.3 Absolute position detection system by DIO [A]
ON
OFF
ON
OFF
1
ON
OFF
ON
OFF
Alarm
No alarm
20 ms or more
ON
OFF
10 ms or more
ON
OFF
ON
OFF
ON
OFF
Alarm
No alarm
2 3 4
1 2 3 4
20 ms or more 20 ms or more
Retry 1 Retry 2
10 ms or more 10 ms or more
18 19
18 19
Retry 3
10 ms or more